US Patent Issued to SEIKO EPSON on Dec. 30 for "Dispersion resin and dispersion liquid and ink using the same" (Japanese Inventors)

ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,602, issued on Dec. 30, was assigned to SEIKO EPSON Corp. (Japan).

"Dispersion resin and dispersion liquid and ink using the same" was invented by Toshihiro Otake (Chino, Japan), Hiroshi Ito (Matsumoto, Japan) and Harunobu Komatsu (Matsumoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A dispersion liquid includes water, a coloring material, and a dispersion resin that disperses the coloring material, and the dispersion resin has a constituent unit A containing a hydrophobic monomer, a constituent unit B containing an unsaturated aliphatic dicarboxylic acid monomer, and a constituent unit C containing an acrylamide monomer having a sulfonic...